Graphophone



L, ROBERTO. GBAPHOPHONE.

vAPPLICATION FILED OCT. 28, |920.

Patented May 2, 1922.

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" L. ROBERTO.

GRAPFOPHONE.v APPLICATION m50 ocT. 2a. 1920.

Patented May 2, 1922,

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L.l ROBEBTU.

GRAPHOPHONE.

APPLICATION FILED oc-zs. 1920.

Patented May 2, 19222..

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STATES YPATENT" FFCE.

LEOPOLDO ROBERTO, or 'PHILAnEnrHIA, rENNsYLvANrA.

GRPHOPHONE.

Specification of Ltt'ei'sviatent.

Patented 'May 2., 1922.

Application sled voctober 28,1920. lserial No. 420,147.

Graphophones, of which the followingisa specification.

llhisinvention relates to certain new and useful improvements ingraphophone's, and has particular reference to the tone ammv sound boxmounting.

A further object of the invention lresides in the provision of agraphophone wherein the tone arm is freely detachable therefrom with thehinged cover of the graphophone box constituting a sounding board uponwhich the outlet end of the tone arm is sup'- ported.

A further object of the invention is lo provide a tone arm forygraphophones where'- in the tone arm embodies a hinge connectionintermediate the ends thereof to permit that portion of the tone armsupporting the sound box tobe moved upon its hinge con nection todisplace the sound box from 'the record disk.

A Still further object 'of the inventionem'- bodies a novel adjustablemounting of a sound box on a tone arm, thesound box being mounted indifferent angular relations relative to the tone arm to accommodate Vthestylus needle in traversing the playing grooves of a record disk ofdierent formations.

With the above general objects in'view and others that will appear asthe nature of the invention is better understood, the same consists inthenovel form, combination and arrangement of parts hereinafter morefully described, shown in the accompanying drawings and claimed.

In the drawings, wherein like -reference characters indicatecorresponding parts throughout the several views,

Figure l is a side elevational view of a gr-aphophone constructed in'accordance with the present invention, a portion of the Vseotional tonearm and sound box being moved to inoperative position and illustrated bydotted lines,

Figure 2 is a top plan view of the same,

Figure 3 is a front elevational view of the tone arm with the hingedsection thereof elevated to inoperative position,

Figure 4 is a horizontal sectional view taken on lineIV-IV `of Fig.'showing the rotatable connection between the tone arm andthe-s'upported bell end thereof,

igure 5 is a cross sectional view taken onhne V--V of Fig. l showing thestylus armroff the gsound b'oxzconnected to the diaphragm, ,Y

Figure Gfisa-fronjt elevational view of the removable-'elbow of the tonevar'm for supporting the sound box,

K Figure 7 is ra Side elevational View of the removable-elbow `of thetone arm,

FigurefS is ra fragmentary side elevational view of the inner end of thetone arm showing the hinge connection between the sectionsthereof, and

Figure 9 is a ycross `sectional view showing the 1connecting meansbetween the elbow seetionandthe rhinged endof the tone arm.

' Referring more in detail to the accompanying drawings and particularlyto Figs. l 'and-2, there is illustrated a f raphophone comprising abox lof hexagonal formation having 2a hingedicover 2 constituting a soundboard vfor thetone arm while the box l is provided with lifting handles3 and an exteriorlypositionedy crank-handle 4 for winding the motormechanism contained within the'box. A turntable `5 is supported uponthejplatform-G of .thebox and the speed of themotor mechanism isunder'control of the lever 7 vas shown in Fig. 2 while the turn table I5'is maintained` -stationary by the brake lever 8.

` The tone arm and sound box is shown in 'detail in Figs. 3 to9 andincludes a horn embodying-sections 9 `and l0, the section 9 beingrotatably connected tothe enlarged hellend :.111 by vva :pin Va-nd slotconnection 12 and 13 las shown in Figs. 3 and 4, the bell endcarrying-supporting pins 14 engaging infsockets 15 in the sound boardcovery 2 as lshownin Figs. il and 3, the bell end 1l being mountedagainst rotation andk permitting limited Yrotary 'movement of the tonearm section :9 'relative thereto.

The sections) and 10 of the tone arm are A removable elbow embodying anintermediate curved portion and right angularly extending ends isassociated with the :tree end of the tone arm section 10 and toaccommodate the connection therefor, the free end oi' the tone armsection 10 as shown in Figs, 3, 8 and 9 is provided with an annularflange 18 having the edge thereo'll provided with two pairs ofrelatively small and large recesses 19 and 2O and having relativelysmall perforations 19 diametrically opposite the small recesses 19 Lforpurposes presently to appear. The removable elbow section is shown moreclearly in Figs. 6 and 7 embodying a tubular member of equal diameterthroughout and having an intermediate curved portion 21 with anangularly directed end 22 while the other end 23 thereof extends atright angles to the end 22. rllhe outer side of the elbow section end 22is provided with a lug 24; while a screw pin 25 having an operating head26 is threaded transA versely of the open end 22 with the head 26 of thescrew adjacent the lug 2a. In mounting the elbow section 21 upon thetone arm. section 10, the end 22 of the elbow section enters the flange18 of the tone arm section 10 with the lug .24 upon the elbow receivedin one of the large recesses 2O with the shank of the screw 25 receivedin a small recess 19 providing a clearance therefor, the end of thescrew pin 25 opposite the head 26 adapted to engage in one of theperorations 19 when the said pin is rotated. ln this position the screw25 has the free end thereof extending through alined openings in the end22 of the elbow and through the flange 18 ot the tone arm section 10,the lug 2a locking the elbow within the tone arm section against rotarymovement while the screw 25 securely retains the elbow within the tonearm. Y

The sound box shown in detail in Fig. 5 is preferably heart shapeembodying a rear wall 27 carrying a collar 28 for reception upon theopen end 23 of the elbow section 2l while a removable clampingrplate 29associated with the plate 27 clamps the dia-V phragm 30 within the soundbox between the gaskets 31. A pair of brackets 32 is carried by thelower end oit' the clamping plate 29 and supports the cross arm 33 ofthe stylus bar 3a, a set screw 85 being carried by the cross arm 33 torretaining a stylus needle 36 in position in the cross arm.

The screw pin and lug connection between the elbow section 21 and thetone arm permits the diti'erent angular mountings of the sound box uponthe tone arm as shown by full and dotted lines in Figs. 1 and 2, thegrooves of the record disk 37 being of various forms, some includingvertical side walls and others tapering side walls so that the angular'adjustment of the sound box as provided by this mounting will presentthe stylus needle for .proper playing position with records of variousforms ot grooves. When the sound box travels inwardly toward the centerof the disk 37, the tone arm section 10 will rotate upon the bellmounting end 11 and at the playing end of the record the tone armsection 10 is moved upon its hinge connection 17 with the section 9 toelevate the sound box 27 from the disk 37. rllhe elbow section 21 may bemounted upon the tone arm section 10 to present major transverse axis ofthe sound box in parallel with the longitudinal axis of the tone arm,and by removing the screw 25 the elbow section 2l may be shiftedrelative to the tone arm section 10 to present the major transverse axisof the sound box at right angles to the longi-i tudinal axis of the tonearm as shown by dotted lines in Fig. 2. The mounting flange 28 ot thesound box is permitted a slight rotary movement on the end 23 of theelbow section to accommodate the sound box in encounteringirregularities in the playing grooves.

`While there is herein shown and described the preferred embodiment ofthe present invention, it is nevertheless to be understood that minorchanges may be made therein without departing from the spirit and scopeof the invention as claimed.

lNhat is claimed as new'is A tone arm for graphophones having a pair ofrelatively small and a pair of relatively large notches within the innerend of the tone arm and perforated at points diametrically opposite thesmall notches of the tone arm, an elbow section received in the innerend of the tone arm and having an integral lateral lug engaging in oneof said relatively large recesses to prevent rotary movement of theelbow in the tone arm, a transverse screw carried by the elbow, theportion of the screw between the elbow and its head being received inone of the small recesses of the said tone arm and the opposite end ofsaid screw passing through the elbow and into one of the perforations ofthe tonearm to retain the elbow therein, and a sound box carried by theother end of the elbow.

ln testimony whereof l aiiix my signature.

LEFOLD@ HUBERT@

